Furnace.



J. H. MORROW.

FURNAGE.

APPLICATION FILED my 31, 1912,

Patented Novfzl, 1914 gag:

Jign,

UmTEDsTArE'sPATENT ormoni.

JoHN H. monnow, or CHICAGO, ILLINoIs.

To all :whom it may concerns l Be 1t known that I, JOHN Monnow, a

I citizen of the United States, residing at Chicago, in the county -of Cook'. and State of Illinois, have invented ,certain-new and useful Improvements in Furnaces,'of,which the' following isa specification.

My invention relates 1n general to furnaces, and more particularly to means for consuming the smoke incident tof' burningsoft coal.

Various mechanisms have heretofore been devised for consuming the smokegenerated when a furnace is fired with soft coal. Many of such'mechanisms have comprised means for feeding steam to the furnace fire-boxes,

while others have consisted of means for gradually diminishing volume of air to be supplied through the fire-doors', the volatile matter of'the coal, which would .otherwise be carried 4up the stack as black smoke, will.

L be so completely consumed as to prevent the sults, it is necessary to regulate the speed at smoking of 'the stack. I have further discovered that in order to 'obtainthe best rewhich the Ere-door is closed after the supply therethrough of each charge of fresh fuel,

according to the'character of the fuel, the

` door as of the smoke.`

draft, and the condition'\under which the furnace is operated, thereby so regulating the volume of air supplied through the re- The objectof my invention. is, therefore, to. provide the, fire-doors oflfurnaces .with means for automatically gradually closing the same after thesup 'lyof each charge of fresh fuel therethroug ,.so as topermita i gr supplied to the fire sutlicient to consume the adually decreasing volume of air to be smoke.

A further object of my invention'is to rovi-'le the 'tire-box of a furnace with ad Justable means for gradually closing the same after the supply of each fresh' charge of fuel, so that the volume of air supplied Specication of Letters Patent.v

' tional view on 1ine2--2, Fig. 11; and Fig.v 3, an enlarged sectional view through the door,A

lcharges of fuel are supplied to the fire. j

' automatic devices for. controlling the'lo'sin'g.

constitute my invention, but may consist of 95 to produce acomplete consumption V upon the'- door and are operatively. connected 'face' of the underlying casing of the devices D and D, .so asto retainthedoor in open" FUBNAGE.

Patented Nov. 24, 1914.

Application :nea May a1, 19124. serial No. 700,719.

to the fire may be ,varied according to the' character of the fuel, the degree Tof the draft,

and the condition under which the furnace is operated, thereby renderingit possibletn secure the conditions necessary to con A the volatile matter of the fuel which Wll otherwise form smoke.

A still further object of my invention istoA provide a furnace with means for securing? the consumption of the smoke, which simple in construction, convenient in-apbli cation, and eiicient in use.

My inventionl will -be more fully disclosed ATo hereinafter with' reference to the accompany# ing drawing, in which the same is illustrated as embodied in a convenient and practical l form, and in which Figure 1 is an elevational view' of a por- 7 5 tion of a furnace; Fig. 2, an enlarged secclosing means.

The same reference characters are used to' 80 'designate the same `parts/in the several g'- ures of the drawing.;

Reference letter A designates a portion of the fro-nt wall of a furnace of -any ordinary character and construction. l j Y Reference characters B" and Bdesign'ate the usual A,fire-doors through which tlie` Reference characters C and. C2 designate the usual ash doors.

Reference charactersvD and Dzdesigfx'ate of the fire-doors B and B2, respectively. AThe controlling devices D and I)2 do not per `se door checks of such construction as tosecure p the automatic closing of the fire-doors in the manner necessary to embodymy invention.

In the embodiment of my invention shown in the drawing, the door checks are mounted 100 V by 'links Ej and E2, respectively, with 4the adjacent Wall of the furnace. f y

' F' and F2 designate the operatingarms'of the devices D andD2, which arms are con 105i nected at their outer ends to the outerends of the respective links E and Egyand at their inner ends to retardi'ng mechanism. Each of the arms F and F2 is provided with aspringdetent G, which, when the correspending furnace door is open, will engage withina notch H formed-inthe' upper surposition. Each of the door closing devices D and D2 may be conveniently constructed as shown in Fig. 3, in which vthe vertical shaftv D, to, which the inner end of the corresponding arm F or F2 is rigidly connect ed, is provided at its lower end with a crank Z pivotally connected by a link d With a piston (Z2 which is adapted to reciprocate Within a cylinder D3.

indicates a check valve which opens to freely permit the passage of the retarding fluid therethrough when the furnace door is opened, but which will prevent the fluid passing through the piston when it moves in a direction to close the furnace door.

Z4 indicates a by-pass extending yaround the piston and which is controlled by a needle valve (Z5. lt will be obvious that by adjusting the needle valve, the fiow of the fluid through the by-pass di* may be regulated and the speed at which the door Will,

improvement are as follows: The furnacev doors are opened preparatory to supplying fresh charges of coal through them to the lire. upper end of the casing of the door closing device relatively to -the spring detent G- until the latter engages within the notch H, thereby `holding the, door open. After the fuel has been supplied, the door is given a slight push inwardly, thereby unseating the detent G from the recess H and permitting the spring D5 to become effective in closing the door. The operation of the spring is controlled by the movement of the piston al? "Within its cylinder, Which in turn is dependent upon the lay-passing of the fluid through passage d4. The needle d is adjusted so as to vary the closing of the door according to the character of fuel which is l-used, according to the efficiency of the draft,

and according to the requirements of each particular furnace. -ltt is necessary that there should be a sufficient volume of air supplied through the fire-door to insure the consumption of the volatile matter to the fuel which would .ordinarily pass .up the stacl': as black smoke. By adjusting the nee` die valve /Z5 and observing the stack after the supply of fuel, it may be readily deten 'mined whether a sufficient quantity of `air is being supplied after ,each charge of fresh fuel to consume the smoke, and, if not, the needle valve d5 may bp further adjusted until the desired result is secured.

From the foregoing description it will be observed that l have invented a simple and economical means for `consuming, smoke, which will not only avoid the disagreeable effects due to the smoke ordinarily generated in burning soft coal, but will contribute to The openingv of each door moves the uilen/ie the economical running of the furnace by insuring the consumption of the particles of the fuel which would otherwise be carried up the stack in the form of smoke. It Will be further observed thatr my invention is applicable to furnaces already in use and may be adjusted according to the conditions of each particular furnace, and according to the character of the fuelburned, so as to ac complish equally efficient results regardless of the special conditions existing at each furnace to which it is applied.

l claim':

l. The combination 'with a furnace, of a lire-door through which fuel is supplied, and means for automatically permitting' a gradually reduced volume of air to be admittedthrough said fire-door after thesupf' ply of fuel therethrough, said means com prising a door check o eratively connected directly with said door for gradually closing the same.

2. The combination With a furnace, of a lire-door through which fuel is supplied, and meansv for automatically permitting a predetermined gradually reduced volume of air to be supplied through said door after the supply of fuel to the lire, said means comprising adoor check operatively connected directly with said door and having adjustable means to regulate the closing of the door according to the character of the fuel,A draft, and requirements of the furnace.

3. The combination with a furnace, of a fire-door' through which fuel is supplied, and means operatively connected directly to said door for holding the same open during the supply of fuel therethrough, and for automatically closing said door at a predetermined speed to permit .a gradually decreasing volume of air to be supplied to the fuel.

il. The combination with a furnace, of a roo door through which fuel is supplied, a door check connected directly lto said fire door and to the' front Wall of the furnace adja- .cent thereto-for1 automatically gradually closing said door and thereby permitting a gradually reduced volume of air to beadmitted directly through said door after the supply of fueltherethrough, and means for adjusting the operation of said door check to vary the rapidity with which the fire door is closed according to the character' of the fuel and draft and the requirements' of the furnace.

. .In testimony'whereoill` have subscribed my name. r"

J @HN l-l. lylOltgROW Witnesses:

,Gao la. WILmNsoN, .Huisnr it. Panne.

llt) 

